东鞍山贫铁矿石磁选预富集行为

doi:10.12068/j.issn.1005-3026.2019.01.018

东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (1): 94-98.DOI: 10.12068/j.issn.1005-3026.2019.01.018

东鞍山贫铁矿石磁选预富集行为

余建文，韩跃新，李艳军，高鹏

(东北大学资源与土木工程学院，辽宁沈阳110819)

收稿日期:2017-11-03 修回日期:2017-11-03 出版日期:2019-01-15 发布日期:2019-01-28
通讯作者: 余建文
作者简介:余建文(1988-)，男，江西余干人，东北大学博士后研究人员; 韩跃新(1961-)，男，内蒙古赤峰人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51734005，51674064)；中国博士后科学基金资助项目(2018M631812)；东北大学博士后基金资助项目(20180316).

Pre-enrichment Behaviors of Low-Grade Donganshan Iron Ore Using Magnetic Separation

YU Jian-wen， HAN Yue-xin， LI Yan-jun， GAO Peng

School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China.

Received:2017-11-03 Revised:2017-11-03 Online:2019-01-15 Published:2019-01-28
Contact: HAN Yue-xin
About author:-
Supported by:
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摘要/Abstract

摘要： 针对东鞍山贫铁矿石(Fe质量分数34.60%)中含有赤铁矿、磁铁矿和少量的菱铁矿，提出了一种弱磁粗选-高梯度扫选的预富集工艺，并借助XRD、铁的化学物相分析及扫描电镜(SEM)考察了磁场强度和原料磨矿细度对东鞍山铁矿石预富集行为的影响.结果表明，在磨矿细度-0.074mm占70%(质量分数)、弱磁粗选磁场强度120mT、高梯度扫选Ⅰ磁场强度300mT及高梯度扫选Ⅱ磁场强度800mT的条件下，可获得Fe质量分数42.67%、回收率95.45%的预富集精矿;磁铁矿富集于弱磁粗选作业中，赤铁矿和菱铁矿在高梯度扫选作业中得到有效富集，尾矿中丢失的铁矿物主要为微细粒赤铁矿(＜10μm)，由于受到的磁性捕获力弱而无法得到回收.

关键词: 贫铁矿石, 赤铁矿, 磁铁矿, 磁选, 预富集行为, 磁性捕获力

Abstract: A pre-enrichment process of low-intensity magnetic roughing followed by high-gradient magnetic scavenging was proposed， and the effects of magnetic field intensity and grinding fineness on pre-enrichment behaviors of low-grade(w(TFe)=34.60%) Donganshan iron ore simultaneously containing hematite， magnetite and a bit of siderite were studied by XRD， chemical phase analysis of iron， and scanning electron microscope(SEM). The results showed that the optimized grinding fineness of raw ore was 70% passing 0.074mm， the magnetic field intensity for roughing， scavenging Ⅰ and Ⅱ were 120mT， 300mT and 800mT， respectively. Under the optimized conditions， a magnetic pre-concentrate assaying 42.67% iron (mass fraction) with an iron recovery of 95.45% was achieved. The analyses revealed that ferromagnetic magnetite was enriched in low-intensity magnetic concentrate， and weakly magnetic hematite and siderite were recovered successfully by high-gradient magnetic separation. However， some ultra-fine hematite particles(＜10μm) were lost in tailing due to their weak magnetic trapping force.

Key words: low-grade iron ore, hematite, magnetite, magnetic separation, pre-enrichment behaviors, magnetic trapping force

中图分类号:

余建文，韩跃新，李艳军，高鹏. 东鞍山贫铁矿石磁选预富集行为[J]. 东北大学学报:自然科学版, 2019, 40(1): 94-98.

YU Jian-wen， HAN Yue-xin， LI Yan-jun， GAO Peng. Pre-enrichment Behaviors of Low-Grade Donganshan Iron Ore Using Magnetic Separation[J]. Journal of Northeastern University Natural Science, 2019, 40(1): 94-98.

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东鞍山贫铁矿石磁选预富集行为

Pre-enrichment Behaviors of Low-Grade Donganshan Iron Ore Using Magnetic Separation

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